CN110165643B - Interconnected microcomputer protection method and system - Google Patents
Interconnected microcomputer protection method and system Download PDFInfo
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- CN110165643B CN110165643B CN201910562395.7A CN201910562395A CN110165643B CN 110165643 B CN110165643 B CN 110165643B CN 201910562395 A CN201910562395 A CN 201910562395A CN 110165643 B CN110165643 B CN 110165643B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000002159 abnormal effect Effects 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims description 13
- 230000005856 abnormality Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
Abstract
The invention provides a method and a system for protecting an interconnected microcomputer, which comprise the following steps: a first auxiliary single chip microcomputer of the first microcomputer protection device determines that the working state of the first controller is abnormal; the first auxiliary single chip microcomputer sends a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus; and receiving response information returned by the second microcomputer protection device and determining whether the second microcomputer protection device takes over the first microcomputer protection device or not according to the response information. The invention can immediately find and take over by other microcomputer protection devices after the controller of a certain microcomputer protection device fails, thereby avoiding the problem of safety accidents caused by the failure of the whole microcomputer protection device due to the failure of the controller of the microcomputer protection device.
Description
Technical Field
The invention relates to the technical field of power supply and distribution, in particular to a method and a system for protecting an interconnected microcomputer.
Background
The microcomputer protection is relay protection formed by microcomputer, and is the development direction of power system relay protection, and it has high reliability, high selectivity and high sensitivity. The system is widely applied to electric power, petrifaction, mine smelting, railways, civil buildings and the like.
A plurality of microcomputer protection devices are required to be arranged in a common large-scale power distribution plant, a transformer substation and the like. The microcomputer protection device is characterized in that a controller controls a relay according to data generated by a data acquisition unit (sensor), so that the protection, measurement and control of the current and the voltage of a system are realized. When a controller (control chip) of the microcomputer protection device breaks down, maintenance personnel can possibly cause large-scale safety accidents if the controller (control chip) is not found in time. Therefore, the timely discovery and processing of the controller fault of the microcomputer protection device are very important for power distribution and power supply production.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a method and system for protecting an interconnected microcomputer, so as to solve the above-mentioned technical problems.
In a first aspect, the present invention provides an interconnected microcomputer protection method, in which a plurality of microcomputer protection devices are interconnected through a CAN bus, wherein the microcomputer protection devices include a controller, a data acquisition unit, a high-strength outlet intermediate relay, and an auxiliary single chip, and include:
a first auxiliary single chip microcomputer of the first microcomputer protection device determines that the working state of the first controller is abnormal;
the first auxiliary single chip microcomputer sends a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus;
and receiving response information returned by the second microcomputer protection device and determining whether the second microcomputer protection device takes over the first microcomputer protection device or not according to the response information.
Further, the sending, by the first auxiliary single chip microcomputer to the second microcomputer protection device through the CAN bus, a request to take over the first data acquisition unit of the first microcomputer protection device includes:
when the working state of the first controller is determined to be abnormal, the first auxiliary single chip microcomputer receives voltage and current data of the data acquisition unit;
and the first auxiliary single chip microcomputer sends the voltage and current data to a second microcomputer protection device through a CAN bus.
Further, after receiving the response message returned by the second microcomputer protection device and determining whether the second microcomputer protection device takes over the first microcomputer protection device according to the response message, the method further comprises:
after determining that the second microcomputer protection device takes over the first microcomputer protection device, the first microcomputer protection device receives a control command returned by the second microcomputer protection device, wherein the control command is generated by the second microcomputer protection device according to voltage and current data of the first microcomputer protection device;
and the first auxiliary single chip microcomputer sends the control command to a first high-strength outlet intermediate relay of a first microcomputer protection device and the first high-strength outlet intermediate relay executes the control command.
Further, the method further comprises:
after the working state of the first controller is determined to be abnormal, the first auxiliary single chip microcomputer sends an abnormal report which is marked by the first microcomputer protection device to the monitoring terminal, and the first auxiliary single chip microcomputer is in wireless communication connection with the monitoring terminal.
In a second aspect, the present invention provides an interconnected microcomputer protection system, comprising:
the abnormality determining unit is configured to determine that the working state of the first controller is abnormal by a first auxiliary single chip microcomputer of the first microcomputer protection device;
the request sending unit is configured and used for sending a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus by the first auxiliary single chip microcomputer;
and the takeover determining unit is configured to receive response information returned by the second microcomputer protection device and determine whether the second microcomputer protection device takes over the first microcomputer protection device or not according to the response information.
Further, the request sending unit includes:
the data receiving module is configured for receiving voltage and current data of the data acquisition unit by the first auxiliary single chip microcomputer after the working state of the first controller is determined to be abnormal;
and the data sending module is configured for sending the voltage and current data to the second microcomputer protection device by the first auxiliary single chip microcomputer through a CAN bus.
Further, the system further comprises:
the command receiving module is configured to be used for receiving a control command returned by the second microcomputer protection device by the first microcomputer protection device after the second microcomputer protection device is determined to take over the first microcomputer protection device, wherein the control command is generated by the second microcomputer protection device according to voltage and current data of the first microcomputer protection device;
and the command issuing module is configured to send the control command to a first high-strength outlet intermediate relay of a first microcomputer protection device by the first auxiliary single chip microcomputer and execute the control command by the first high-strength outlet intermediate relay.
Further, the system further comprises:
and the abnormality sending module is configured to send an abnormality report identifying that the first microcomputer protection device identifies to the monitoring terminal after determining that the working state of the first controller is abnormal, and the first auxiliary singlechip is in wireless communication connection with the monitoring terminal.
The beneficial effect of the invention is that,
the invention provides an interconnected microcomputer protection method and system, wherein a plurality of microcomputer protection devices are interconnected through a CAN bus by arranging an auxiliary single chip microcomputer, after a controller of one microcomputer protection device breaks down, the single chip microcomputer of the microcomputer protection device immediately receives current and voltage data of a data acquisition unit and sends the data and a take-over request to another microcomputer protection device through the CAN bus, after the other microcomputer protection device responds to the take-over request, a corresponding control command is generated according to the received current and voltage data and is returned to the auxiliary single chip microcomputer of the failed microcomputer protection device, and the auxiliary single chip microcomputer sends the control command to a high-strength outlet intermediate relay and the high-strength outlet intermediate relay executes the control command. The invention can immediately find and take over by other microcomputer protection devices after the controller of a certain microcomputer protection device fails, thereby avoiding the problem of safety accidents caused by the failure of the whole microcomputer protection device due to the failure of the controller of the microcomputer protection device.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
FIG. 2 is an architecture diagram of a microcomputer protection device of the method of one embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following explains key terms appearing in the present invention.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention. The execution body of fig. 1 may be an interconnected microcomputer protection system.
Specifically, the method for protecting the interconnected microcomputer comprises the following steps:
firstly, in the same area, a plurality of microcomputer protection devices need to be interconnected through a CAN bus, wherein the microcomputer protection devices comprise a controller, a data acquisition unit, a high-strength outlet intermediate relay and an auxiliary single chip microcomputer as shown in figure 2. In this embodiment, the method provided by the present invention is described by taking an example in which three microcomputer protection devices are interconnected via a CAN bus.
The first microcomputer protection device comprises a first controller, a first data acquisition unit, a first high-strength outlet intermediate relay and a first auxiliary single chip microcomputer. The second microcomputer protection device comprises a second controller, a second data acquisition unit, a second high-strength outlet intermediate relay and a second auxiliary single chip microcomputer. The third microcomputer protection device comprises a third controller, a third data acquisition unit, a third high-strength outlet intermediate relay and a third auxiliary single chip microcomputer.
The first microcomputer protection device is explained as an example of a failure. The first auxiliary single chip microcomputer monitors the working state of the first controller constantly, the monitoring method can adopt a method of monitoring a dog feeding signal lost by the first controller, and if the dog feeding signal is not monitored, the working state of the first controller is judged to be abnormal; or continuously detecting the communication connection state of the first auxiliary single chip microcomputer and the first controller, and judging that the first controller is abnormal if the first auxiliary single chip microcomputer cannot identify the first controller. After the first auxiliary single-chip microcomputer determines that the working state of the first auxiliary single-chip microcomputer is abnormal, the abnormal prompt information is sent to the monitoring terminal through the wireless communication module, and operation and maintenance personnel can find out faults in time and process the faults in time conveniently. Meanwhile, the first auxiliary single chip microcomputer receives current and voltage data of the first data acquisition unit and sends the current and voltage data and a takeover request to the second auxiliary single chip microcomputer through the CAN interface, the second auxiliary single chip microcomputer determines whether the working state of the second controller is normal or not, if the second controller is normal, response information agreeing to takeover is returned, meanwhile, the current and voltage data of the first microcomputer protection device are uploaded to the second controller, the second controller generates a control command for the first high-strength outlet intermediate relay according to the current and voltage data, the control command is sent to the first auxiliary single chip microcomputer through the CAN bus, the first auxiliary single chip microcomputer forwards the control command to the first high-strength outlet intermediate relay, and the first high-strength outlet intermediate relay executes the control command. Thus, the first microcomputer protection device can still work normally under the condition of failure of the first controller. If the second controller cannot take over the first microcomputer protection device, the second auxiliary single chip microcomputer returns response information that the first microcomputer protection device cannot take over, and the first auxiliary single chip microcomputer sends current and voltage data and a take-over request to the third microcomputer protection device.
The present embodiment further provides an interconnected microcomputer protection system, including:
the abnormality determining unit is configured to determine that the working state of the first controller is abnormal by a first auxiliary single chip microcomputer of the first microcomputer protection device;
the request sending unit is configured and used for sending a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus by the first auxiliary single chip microcomputer;
and the takeover determining unit is configured to receive response information returned by the second microcomputer protection device and determine whether the second microcomputer protection device takes over the first microcomputer protection device or not according to the response information.
Optionally, as an embodiment of the present invention, the request sending unit includes:
the data receiving module is configured for receiving voltage and current data of the data acquisition unit by the first auxiliary single chip microcomputer after the working state of the first controller is determined to be abnormal;
and the data sending module is configured for sending the voltage and current data to the second microcomputer protection device by the first auxiliary single chip microcomputer through a CAN bus.
Optionally, as an embodiment of the present invention, the system further includes:
the command receiving module is configured to be used for receiving a control command returned by the second microcomputer protection device by the first microcomputer protection device after the second microcomputer protection device is determined to take over the first microcomputer protection device, wherein the control command is generated by the second microcomputer protection device according to voltage and current data of the first microcomputer protection device;
and the command issuing module is configured to send the control command to a first high-strength outlet intermediate relay of a first microcomputer protection device by the first auxiliary single chip microcomputer and execute the control command by the first high-strength outlet intermediate relay.
Optionally, as an embodiment of the present invention, the system further includes:
and the abnormality sending module is configured to send an abnormality report identifying that the first microcomputer protection device identifies to the monitoring terminal after determining that the working state of the first controller is abnormal, and the first auxiliary singlechip is in wireless communication connection with the monitoring terminal.
In the embodiments provided by the present invention, it should be understood that the disclosed system, system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. An interconnection microcomputer protection method is characterized in that a plurality of microcomputer protection devices are interconnected through a CAN bus, wherein each microcomputer protection device comprises a controller, a data acquisition unit, a high-strength outlet intermediate relay and an auxiliary single chip microcomputer, and the method comprises the following steps:
a first auxiliary single chip microcomputer of the first microcomputer protection device determines that the working state of the first controller is abnormal;
the first auxiliary single chip microcomputer sends a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus;
receiving response information returned by the second microcomputer protection device and determining whether the second microcomputer protection device takes over the first microcomputer protection device or not according to the response information;
after receiving the response message returned by the second microcomputer protection device and determining whether the second microcomputer protection device takes over the first microcomputer protection device according to the response message, the method further comprises:
after determining that the second microcomputer protection device takes over the first microcomputer protection device, the first microcomputer protection device receives a control command returned by the second microcomputer protection device, wherein the control command is generated by the second microcomputer protection device according to voltage and current data of the first microcomputer protection device;
the first auxiliary single chip microcomputer sends the control command to a first high-strength outlet intermediate relay of a first microcomputer protection device and the first high-strength outlet intermediate relay executes the control command;
the method further comprises the following steps:
after the working state of the first controller is determined to be abnormal, the first auxiliary single chip microcomputer sends an abnormal report marked with a first microcomputer protection device to the monitoring terminal, and the first auxiliary single chip microcomputer is in wireless communication connection with the monitoring terminal.
2. The method of claim 1, wherein sending, by the first auxiliary singlechip, to the second microcomputer protection device over the CAN bus, a request to take over a first data acquisition unit of the first microcomputer protection device comprises:
when the working state of the first controller is determined to be abnormal, the first auxiliary single chip microcomputer receives voltage and current data of the data acquisition unit;
and the first auxiliary single chip microcomputer sends the voltage and current data to a second microcomputer protection device through a CAN bus.
3. An interconnected microcomputer protection system, said system comprising:
the abnormality determining unit is configured to determine that the working state of the first controller is abnormal by a first auxiliary single chip microcomputer of the first microcomputer protection device;
the request sending unit is configured and used for sending a request for taking over the first microcomputer protection device to the second microcomputer protection device through the CAN bus by the first auxiliary single chip microcomputer;
a takeover determining unit configured to receive response information returned by the second microcomputer protection device and determine whether the second microcomputer protection device takes over the first microcomputer protection device according to the response information;
the system further comprises:
the command receiving module is configured to be used for receiving a control command returned by the second microcomputer protection device by the first microcomputer protection device after the second microcomputer protection device is determined to take over the first microcomputer protection device, wherein the control command is generated by the second microcomputer protection device according to voltage and current data of the first microcomputer protection device;
the command issuing module is configured for the first auxiliary single chip microcomputer to send the control command to a first high-strength outlet intermediate relay of a first microcomputer protection device and the first high-strength outlet intermediate relay to execute the control command;
the system further comprises:
and the abnormality sending module is configured to send an abnormality report marked with a first microcomputer protection device to the monitoring terminal after determining that the working state of the first controller is abnormal, and the first auxiliary single chip microcomputer is in wireless communication connection with the monitoring terminal.
4. The system according to claim 3, wherein the request sending unit comprises:
the data receiving module is configured for receiving voltage and current data of the data acquisition unit by the first auxiliary single chip microcomputer after the working state of the first controller is determined to be abnormal;
and the data sending module is configured for sending the voltage and current data to the second microcomputer protection device by the first auxiliary single chip microcomputer through a CAN bus.
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| CN1207970C (en) * | 2002-01-30 | 2005-06-29 | 福建农林大学 | 'Strong pest-expellant powder' for agricultural purpose |
| CN101877528B (en) * | 2010-05-27 | 2013-02-13 | 国电南京自动化股份有限公司 | Double-CPU (Central Processing Unit)redundancy fault-tolerant system based on high-voltage frequency converter and realizing method thereof |
| CN103368148B (en) * | 2013-07-16 | 2016-08-03 | 国家电网公司 | A kind of protection system being applicable to power electronic equipment emulation |
| CN103915816A (en) * | 2014-04-22 | 2014-07-09 | 中国船舶重工集团公司第七一二研究所 | Dual-redundancy protective device and protection method |
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| CN201674386U (en) * | 2010-05-27 | 2010-12-15 | 国电南京自动化股份有限公司 | Double-CPU redundancy fault-tolerant system based on high-voltage frequency converter |
| CN104850043A (en) * | 2015-04-27 | 2015-08-19 | 浙江恒自电力自动化设备有限公司 | Microcomputer protection measurement and control device |
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| 基于信息冗余的站域保护优化方案;李倍;《电力与能源》;20140630;第35卷(第3期);正文1.3节，2.4节，附图2-3 * |
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